The cancer-causing factors all include which

1, physical factor:If the electricity leaves radiation, ultraviolet ray, hot radiation, chronic machine and burning sex stimulate, foreign body etc..
2, chemistry factor:Have already known to reach to about 3000 kinds more to the chemistry material that the animal can cause cancer now, among them affirmative have cancer-causing function to the person to also have several kinds.
3, living creature factor:Some viruses, fungi and parasite infections can cause cancer.
4, inherit a factor:Have already known that minority of tumors have hereditary and have something to do with gene.
5, hormone:Inside the source and the outside source sex hormone have something to do with some cancers(such as the film cancer in the cervical cancer, womb etc.).
6, nourishment factor:The nourishment is excessive or lacks to take place to the tumor to be relevant.
7, social factor:Various with the result that proliferation and society of the material of disease are closely related, the spirit mental factor also has relation with cancer.